3200 GPRS & MMS problems

Living in Republic of Ireland and using a 3200 on the the Meteor network (272-03). both MMS and GPRS were working for about 3 weeks up until 23rd of December when all of a sudden just keeps saying ""GPRS Connection unavailable"" or else sometimes it will say ""creating GPRS connection" but then just wont amount to anything. Network have checked out all things at their end, and have even sent a technician out the local mast to see if its a transmission fault. GPRS works perfectly when my Sim card is in another handset (a Sagem Myx5). The Handset connects to GPRS without any problems when used with another network and set up accordingly. The settings used by this network at just generic "nokia" settings. Im at wits end becuase its obviously not the handset. but at the same time its not the sim or network. is there any known issues or bugs about the 3200's compatibility with certain GPRS systems. Meteor are a very new dual band network using GSM900 and DCS1800. Any solutions/eye openers are welcome...
Cheers
Niall