The price is not changed when is selected cart variant (custom field)

[servlet]

The price is not changed when is selected cart variant (custom field)
I have a problem:
Product price is $50
Size Normal - no additionl charge
Size L +$10
Sice XL +$15

When I select Size L or XL the price is not changed and it display $50 in product view.

Where is the problem?

J!2.5.19
VM 2.0.26d

[Maxim Pishnyak]

Java script conflict?

[servlet]

Hmmm
How can I check?

[jenkinhill]

http://forum.virtuemart.net/index.php?topic=119638.0