Airdrop fails instantly.

Our school has recently deployed a 1:1 Macbook program. When students try to airdrop a document to either eachother or to a teacher the transfer imediatly fails.

Student Machines

Macbook (Mid-2010)

Mac OS 10.7.2

Users are standard local accounts

MCX being managed by Casper Suite JSS ver 8.31

Teacher Machines

Macbook Pro (Mid-2009 2.53GHz)

Mac OS10.7.2

Managed,Mobile,Admin accounts

MCX comming from Active Directory

I have tried all of the other fixes i.e force quit finder,restarting on both the sender and recipient machines.Here is the error I could find in Console.

1/20/12 12:24:14.619 PM mDNSResponder: xD2DFindInList: Could not find in D2DRecords: 59 e962aa17a023._airdrop._tcp.local. TXT cname=bms-o-451370G7GST¦phash=nrSPEyJ0l0ysH46fFDfjhAlMnCk=

whereas bms-o-451370.... is the host name of the recipient. Any help at all please!