Blank page on checkout. Please help..

[DimLV]

I saw many post with that problem, but never find solution. If there is already, can you provide link please? I have two payment methods - Paypal and standart. Paypal is working fine. Standart I'm using with coupon code, when price is 0,00 USD. But right after checkout it's rederecting me to blank page.
I've tried with and without SEF.
Link I'm redirected
http://time4digi.com/index.php?option=com_virtuemart&view=cart&task=confirm
Joomla! 2.5.16
VM 2.0.24
Kindly ask you for help 

[GJC Web Design]

by blank do you mean a white screen  (fatal error) or is the template there with nothing in the content area?

[DimLV]

Fatal Error. Page with message "This webpage is not available"

[GJC Web Design]

does the standard method work if the amount is above 0.00?

If it is a fatal error it must be logged some where on your server , check all your log files etc - if you can't find any ask your host

[DimLV]

does the standard method work if the amount is above 0.00?

I made price more than 0.00 and found same problem. If I switch error logs in joomla config to development mode, it appear just white screen, without any errors or webpage is not available message. Probably I have to look joomla error logs, but I'm not so expirienced with them. Paypal payment plugin is working fine. Do you thing hoster can help me?

[GJC Web Design]

yes - if it is a white screen it's a php fatal error normally...

the error will be logged somewhere but this is very host dependent.. could be wriiten as a error_log in the Joomla root or in the host root logs folder etc
host will know