[TYPO3-shop] Table error!, Probably one or more required fields/tables are missing in the database!

[Kate Schrøder Jensen]

This is the message I'm getting looking in th Ext Manager for 
tt_products. I guess it causes all the warning I get when I'm in List 
showing the sysFolder of the shop. Here I can make new products but not 
new categories. The warnings sounds like:

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result 
resource in /var/lib/typo3/typo3_src-4.1.3/t3lib/class.t3lib_db.php on 
line 783

Warning: Cannot modify header information - headers already sent by 
(output started at 
/var/lib/typo3/typo3_src-4.1.3/t3lib/class.t3lib_db.php:783) in 
/var/lib/typo3/typo3_src-4.1.3/typo3/template.php on line 618

The thing that puzzels me the most is, that I allready got a site up and 
running with the same extensions and configuration.

This is the related extensions I have installed:
tt_address 2.2.1
nsb_cat2menu 0.0.1
sr_feuser_register 2.5.8
tt_products 2.5.5
fh_libery 0.0.20
lib 0.0.20
mbi_products_categories 0.1.1
sr_static_info 2.0.0
static_info_tables 2.0.6
div 0.1.0
table 0.1.13
templavoila 1.3.0

How can I solve my problem?

Thanks, Kate