I am executing bcp from 12.5 version the server to which i am usign is 11.1 version .When i run the bcp I get the following error

bcp fox.fox_USER.INSTRUMENT out test -Usa -P*****
-STK_FOX1_UAT -c -t'\t' -r'\n' -eErrBcp.out

Server Message: TK_FOX1_UAT - Msg 4002, Level 14, State 1:
Login failed.

CTLIB Message: - L4/O1/S4/N44/4/0:
ct_connect(): protocol specific layer: external error: The attempt to connect to the server failed.
Establishing connection failed.