PFCSIG Message.stringparm Problem (Pb 7)

[PARAG-hotmail-pb]

hi all, i am having a serious Problem with message.stringparm.we had migrated from pb5 to pb7 .sometimes message.string parm works fine while in some cases it loses its value. is this a bug in pb7 and is there a workaround for this   Pl.Help Thanks in Advance Parag B.Bhagwat