Flowcontrol between 3560 and 2950 does not work?

Configuration:
==============
C3560 Software (C3560-IPBASEK9-M), Version 12.2(25)SEB1, RELEASE SOFTWARE (fc1)
interface GigabitEthernet0/3
description R14 Trunk 50,[100],102,105,199
switchport mode trunk
switchport nonegotiate
flowcontrol receive on
end
connected to
============
C2950 Software (C2950-I6K2L2Q4-M), Version 12.1(22)EA6, RELEASE SOFTWARE (fc1)
interface GigabitEthernet0/1
description R01 Trunk 50,[100],102,105,199
switchport mode trunk
switchport nonegotiate
flowcontrol receive on
flowcontrol send on
end
Port Gi0/1 on 2950 has sometimes no buffer and drops packets:
============================================================
GigabitEthernet0/1 is up, line protocol is up (connected)
Full-duplex, 1000Mb/s, media type is RJ45
input flow-control is on, output flow-control is on
193421146 packets input, 2844802437 bytes, 2637 no buffer
0 input errors, 0 CRC, 0 frame, 0 overrun, 2637 ignored
but it never sends a pause packet:
==================================
cs-a2p5#sh flowcontrol
Port Send FlowControl Receive FlowControl RxPause TxPause
admin oper admin oper
Gi0/1 on on on on 0 0
What am I doing wrong? I have realized that this data overload is caused by
server with 1Gbs interface pushing data to server with 100 Mbs interface.
I vould expect it should not affect a trunk with flowcontrol on.
Tomas

By wild guess, is the flowcontrol also enabled at the interface to / at both servers ? If there is only flowcontrol between switches but no flowcontrol at servers then it may create the problem. Please advise more.
Moreover, if you transmit 10 times of traffic to a receiver that it can handle, there may be packet drop and flowcontrol to ask for retransmittion.

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~~~~~~~~~~~~~
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