SAP Script : Image problem

Dear Friends,

I am working on Check, it is working fine.

Now My requirement is, If the net Amount is more than 50,000. I should populate second signature.

So, I have created other window with second signature and in Script editor.

I wrote

/: IF &REGUD-SWNET& GE 50000

/: BITMAP .........

/: ENDIF

But it is not working. when I remove the condition both signatures are poping up. I dont know where I am doing mistake.

1) Should I put '50000.00' or '50,000' or without inverted commas just 50,000

2) rugud-swnet field contains comma and decimals, so it is making any problem.

3) I have tried even using &REGUD-SWNES&, but this field contains ****50,000.

Please advice me. Also advice me, when should we use inverted commas and when should not.

Thanks & Regards

Venkat.