suggest not working if DCR format is changed

Richu

Hi All,
If I go for the normal format of the DCR i.e iwov then I get automatic suggestions but if I change the format from iwov to xml then automatic suggestions does not work. also if i click on the suggest button, i dnt get any suggestion. Another thing I observed is that if I manually modify DCR so that it is changed to multi lines then i get automatic suggestions. Has any1 come across such situation.
Any kind of help is appreciated.
thanks,
Richa