Make sure you haven't checked off the "resize image" box(assuming you're using imageshack.us). 

oh lol sorry yes i was doing that. thx

done that but it come up still too small like how it is now

Ah.  I see the problem.  Use this URL instead:

http://img162.imageshack.us/img162/9711/iasig.png

However, it won't show the full image because it exceeds the maximum width allowed here.  But it'll still be bigger than it is now.

so all i have to do is either a)post this link into my sig. or b)make the width of the original smaller