problem with smart forms.......

Hi friends, I m facing a strange problem while using smart form. I am using values from standard smartform for invoice n just modifying the layout. The problem is tht,the value i m getting is like '14.223,56' bt the actual value that i want should be '14,223.56'. That is the '.' and ',' are interchanged. Please tell me some way by which i can make it right.

Good points will surely be awarded for answers.

Thanks..........