[TYPO3-english] BE-module looses page in focus

[bernd wilke]

with my new BE-module I noticed a strange behaviour:

when I'm in the BE and select my module the selected page from the 
previous active module (e.g. page-module) stays selected.
if I don't change the selected page and change module again the selected 
page is recognized.

if I change the selected page inside my module the next module change 
results in the message:
"Please, select a page from the page tree."

Probably I miss a setting of the current page(id).
where is the id stored?
is a special configuration / initialization neccessary?
how is this selection transfered from one module to another (e.g. page 
-> template -> info -> list -> function -> page )

bernd
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