Auto-attach to process aspnet_wp.exe on machine xxxxxxx failed. Error code 0x8013134b.

I got this error when i run something using visual studio 2003.

My system also has .net 2. So IIS assign using .net 2 as asp.net framework

Go to IIS, right click on the website, and select property, click aps.net tab, change asp.net version number to 1.1