Hi frnds

I am using a datagrid to display some information in my asp.net project.
In that i have used one hyperlink column and remaining are template columns.

The problem is that my grid's visibility property is turning false automatically.Even if i change that to true it will become false again.

Is there any conflict between template columns and hyperlink columns.
Or is there any rule like we can't give different type of columns in a datagrid.