Fatal error: Class 'SRCurrency' not found

Hello,
I use Solidres with the Icetheme template IT The Lodge3.
Everything is going fine until I use the left side "Make a reservation" module : after editing the dates I click on the check button, and it comes a page showing :
Fatal error: Class 'SRCurrency' not found in /home/lescarra/public_html/components/com_solidres/views/reservationasset/view.html.php on line 52
When I use the standard Solidres menu, everything goes well. I checked on the forum and went sure I declared room type and standard tariff, creating a tax, assigned the default asset, but it's not working.
You can see it at lescarrasques.com
Thanks for your help
Eric