[Serusers] serweb CTD and IM problem! Heeeelp!

Hi, I posting for the fourth time on the row!!!! Can ANYONE answer me please! I have installed serweb 0.9.4, ser 0.9.6, php4 with all the supports needed, pear with DB support, apache 1.3, mysql 1.3.34. Did i miss anything? Oh, pear Log is also installed. Everything is working fine EXCEPT that i cannot send IM from serweb as well as I cannot CTD from serweb. They both reply with "503 Service Unavlailable" or sometimes its 408 Timeout. There's no documentation or threads in the mailing list on this topic, so i cannot look up what is wrong. All available documentation is obsolete. SIP clients I use are eyeBeams, so they both support REFER and MESSAGE methods. Here's /var/log/message log after trying to CTD (both clients are registered!): May 17 16:06:35 sip /usr/local/sbin/ser[47471]: ERROR: udp_send: sendto(sock,0x284be0d0,546,0,0x284bd4f8,16): Host is down(64) May 17 16:06:35 sip /usr/local/sbin/ser[47471]: msg_send: ERROR: udp_send failed May 17 16:06:35 sip /usr/local/sbin/ser[47471]: Warning: run_failure_handlers: no UAC support (0, 256) Here's /var/log/message log after trying to IM: May 17 16:09:52 sip /usr/local/sbin/ser[47471]: ERROR: udp_send: sendto(sock,0x284be0d0,462,0,0x284bd4f8,16): Host is down(64) May 17 16:09:52 sip /usr/local/sbin/ser[47471]: msg_send: ERROR: udp_send failed May 17 16:09:52 sip /usr/local/sbin/ser[47471]: Warning: run_failure_handlers: no UAC support (0, 256) I set log level for serweb to PEAR_LOG_DEBUG and among some normal trace stuff i can see something like this May 17 16:13:20 serweb [debug] Html form was not assigned to APU apu_aliases3. Useing default. May 17 16:13:20 serweb [debug] Html form was not assigned to APU apu_acl4. Useing default. ( Is there something I forgot to set or is it just normal? I suppose it's ok, if it's "using default"...) ngrep trace show some empty messages from my eyeBeam to SER and backwards. That's all. I've been stuck with this for 4-5 days already and I REALLY need to get it done asap. Someone... anyone... please, suggest something. Best regards, Andrey.