Select Options for VBELN

Hi,

I am trying to place select option for VBELN by using WDR_SELECT_OPTIONS but i am unable to get list of values from select option. I tried for S_CARR_ID it works fine and i got list of values. can any one help me why its not coming for VBELN.

Working Corrent

Not Working

My Code

Thanks

S. Sai Santhosh