telerik radgrid filtering

Hi, i am populating data using telerik radgrid in my project

and trying to filter columns, intially i am not getting all the filter conditons[few are showing],and when i set

datatype to system.string i got all the filter conditions but not able to get the result[i am binding numeric values] when i try to filter with

'greaterthan' for above 2 digit values and if i take datatype as system.int32 its fine but not showing all the filter conditions

.How to get the results with all the filter conditions .thanks