Below I've listed a reply from nsoftware and tested the fix, now we just need it hot fixing in the current payment dll.
Current code uses
Icharge1.AddSpecialField("Currency", "GBP") // I assume this or similar




I've tested the solution below in nsoftware's iCharge demo app and my gateway works with transaction approved!



================Snip

[2]I apologize for the confusion; the Currency special field already exists when the Protx gateway is selected. Rather than add Currency as a special field, you should overwrite the existing Currency special field so that GBP is supplied as a value. Protx has 2 special fields that are used, "VPSProtocol" and "Currency". Since Currency is the second index, you can correctly set the currency code with the following code:


ICharge1.SpecialFieldValues(2) = "GBP"

Regards,

James Neeley

Technical Support

/n software, inc.

====================end snip

Anthony


[/2]