I am not sure the export permissions on server1 and server2 are same from the application stand point but application is working fine (able to write to mounts) on both server1 as well as server2.
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test1.test.com:/1/default on /team/iwmnt/default type nfs remote/read/write/setuid/vers=2/xattr/dev=424005d on Wed Jan 7 12:30:36 2009
test1.test.com:/1/default...