Hi Gail,
Thanks for the suggestion. Here you go:
Oldest active transaction:
SPID (server process ID): 507
UID (user ID) : -1
Name : user_transaction
LSN : (86450:32972:1)
Start time : Apr 5 2014 10:10:32:687PM
SID : 0x175cce5b0a5e7e478614a5b3d139fac8
--Karen