Search with price only works with admins

[esedic]

Hi!

I hve one really big problem I can't resolve.
I'm using 3rd party filter extensions Virtuemart 2 Product Filter by Custom Fields: myext.eu/en/vmcustom-param-vip.
When I try to search only through VM product price I get blank page.
Price search only works if I'm logged in as administrator or above.
I guess there is something wrong with shopper groups.
I checked database tables and compared them with default VM sample data and I didn't noticed anything unusual.
I tried to change id of the virtuemart_shoppergroup_id in #_virtuemart_product_prices table (it was 0, I tried with 1 and 2, which are default and anonymous), but no success.
Of course I also wrote to extension developer but I strongly suspect there is something wrong with the database as I have migrated from J1.5 and VM1.
I'm using Joomla 2.5.16 and VM 2.0.22c (yes, I know, I must update, it's on todo list).

Any advice would be appreciated!

[esedic]

Update: it looks like the problem was in ACL manager extension which I have installed on this site.
After disabling it price search started to work.