It sounds like you format is incorrect, I've seen this before on non-English servers, where the formatting uses a comma separator instead for decimal instead of a decimal point. (Which is very odd, because the format usually states a decimal point!!) Or it could be that the decimal point doesn't need to be there at all.
Check what format worldpay wants for the currency in GBP and then look at the "LogFiles" folder in the portal root and see if you have any useful information in there.
Dave.
Check what format worldpay wants for the currency in GBP and then look at the "LogFiles" folder in the portal root and see if you have any useful information in there.
Dave.