Discoverer Reports - Two separate databases, different tables in each??

hiya

As a company we hold two separate licences so use two separate database for EXOR, when writing discoverer reports there are more tables abavialbe in the NEDL databas than the YEDL one?  Any idea why this is?  the ones in the NEDL which are NOT in the YEDL are:-

 

Tma Notice Errors

TMA Notice Types

TMA Validation Errors

TMA Wors Categories

 

Thanks

ali