[TYPO3-mvc] Extbase: Missing values

[Peter Falk]

Hi,
I have some problems fetching values from table fe_users.

In short the fe_users TCA has been extended via ext_tables.php in one 
plugin and I want to use the field/value in another.

I have created my own model that extends 
Tx_Extbase_Domain_Model_FrontendUser, added getter/settet, mapped the 
field in setup.txt and changed the object type to my own front end user 
model where necessary. But the value (integer) isn't set.

I think I read somewhere, that using fields that are added in another 
plugin is difficult, because Extbase doesn't read the whole TCA but only 
the original (fe_users) and what might have been added in the actual 
plugin. Is this correct and how does one overcome this obstacle?

Regards
Peter