4TB HDD not working on windows server 2003 SP2

Hello there,

i brought a 4TB HDD to store some backups i converted to GPT but still the server sees only 1,64TB and no more space available, when i checked first time on my windows 7 x64 i was able to see un allocated the 3,7TB space, can someone explain how should i proceed? As i saw on MS site the windows server 2003 SP1 should already able to handle GPT + 2TB disks?

Thanks

Ervin