Help in Designing Desktop

I have two portals with two columns on the page

1) first column is thin with border to it

2) second column is thick with border to it

But there is a gap in between the two columns, I could not figure out what is the problem whether is it with style sheets or the page design.

I need help in figuring out of removing the gap in between the two columns.

[389 byte] By [Sachin1206] at [2007-11-25 19:11:14]