Low resolution textures

Hi, I'm not new to OpenGL but I picked up this package recently and started playing with it.
I have encountered a problem that I'm not sure how to solve and I haven't been able to find a solution searching the interwebs.

I am loading textures in using the following code:

` var texture = new SharpGL.SceneGraph.Assets.Texture();`
` texture.Create(gl, filename);`

But when I render them onto a polygon they are extremely low resolution. It looks like about 100x100 but the source image is much higher resolution than that.

to add the texture I later call:

`gl.Enable(OpenGL.GL_TEXTURE_2D);`
`gl.BindTexture(OpenGL.GL_TEXTURE_2D, 0);`

Thats all the texture commands I call other than supplying each vertex with a gl.TexCoord
This all works fine but its just that the displayed image is very pixilated and blurry.

Is there some OpenGL setting that I must use to enable higher resolution textures?