[TYPO3] Error! Reason: Segment "video_visning" was not a keyword for a postVarSet as expected!

[Lasse Guldsborg]

Hi list

I have made an extension which displays videos in a pop-up window. But I'm 
having a lot of trouble making it cooperate with REALurl. I have made a 
specific page i the web-tree which is used as a template for the pop-up 
window; "video visning". But when the window pops up it displays this error 
message:

Error! Reason: Segment "video_visning" was not a keyword for a postVarSet as 
expected!

Does anyone have an idea how to solve this?

Cheers,
Lasse