[Typo3-shop] Upgrade Error 1.2.7 - 2.0.0

[mischa]

Hi Guys!

I've just installed a completely new Typo3.7 installation on my debian 
server. My first action was installing

tt_products 2.0.0

Unfortunately the Extensions Manager says:

##############################
Database status: Table error!
Probably one or more required fields/tables are missing in the database!
##############################

I've found ONE posting regarding this problem on the net (typo3-site), 
but it didn't really help me solving this problem...

Thx in advance



By the way:
I'm new to Typo and would appreciate some tips regarding the shop 
modules and addons. Which of those is best?
tt_products, zk_produkts or mkl_products
are the other addons like shopsort compatible with the non-tt versions?