custompages in my sharepoint error "The file \_layout\test\test.apx\ donnot exist" after restore site collection to other webapplication

dear all

Recently i have a problem with sharepoint 2007

I restore a site collection into other webapplication. Restore success but when i browser any custom page i get error: the file "\_layout\test\test.aspx" not exist

I check folder "C:\Program Files\Common Files\microsoft shared\Web Server Extensions\12\TEMPLATE\LAYOUTS\test\"  file test.aspx still exist

Have you ever got problem?

pls help me!