Problem with flashing BS-11

Hello All, Did anyone ever experienced such strange problems when downloading firmware into BS-11? === $ bs11_config bs11_config (C) 2009-2010 by Harald Welte and Dieter Spaar This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY LMT LOGON: ACK PHASE: 1 Software required Abis-link: Down <0005> abis_nm.c:1196 Software Load (BTS 0, File "BTSBMC76.SWI") Software Load Initiate ACK === ...and then nothing happens for hours. I.e., no progress percentage, segment acknowledges, etc. Does it mean that BTS is broken or something other? Regards, Sergey.