No Specified thread error

Please help
when i am not logged in and try to reply to a post
instead of logging me in and then taking me to the post message area
it shows me No specified thread error

[SmEdD]

I noticed you have a custom template and woundering if you started to get this error after you made this template.

[msimplay]

hmm maybe not sure but what would i have to edit to fix this ?
if it was to do with templates