problems with aTV flash when using time capsule

hi guys, i am using aTV flash for several weeks and it worked very well so far. recently i started to use new time capsule and somehow i am experiencing problems with accessing iTunes and downloading metadata. with my old router it works fine: i changed it back and checked - all appears as it should be with all the apps, iTunes, metadata, etc. switching back to time capsule and it behaves like it is not connected to the internet. anybody seen this problem? ay ideas what can be the issue? thanks!