SSRS PIOLEDBENT MAX() function error

Hi,

I am querying the AF server from SSRS. I am using the SELECT MAX(Archive.Value) FROM [Archive] WHERE Archive.[Time] BETWEEN '01-JUN-2014' AND '10-JUN-2014', but I am getting the following error

'[MAX] Overload resolution failed for (Variant) argument(s). (PIOLEDBENT)'.

The Archive.Value is of variant type.

Has someone has this issue? If so, resolution!