rezal

Recently, i had a problem to log in to the LINUX server using NoMachine but previously it runs fine. The details of the problem is stated below. It always give me this descriptions everytime i failed to log in.
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NX> 203 NXSSH running with pid: 2240
NX> 285 Enabling check on switch command
NX> 285 Enabling skip of SSH config files
NX> 285 Setting the preferred NX options
NX> 200 Connected to address: 10.64.226.219 on port: 22
NX> 202 Authenticating user: nx
NX> 208 Using auth method: publickey
HELLO NXSERVER - Version 1.5.0-60 OS (GPL)
NX> 105 hello NXCLIENT - Version 1.5.0
NX> 134 Accepted protocol: 1.5.0
NX> 105 SET SHELL_MODE SHELL
NX> 105 SET AUTH_MODE PASSWORD
NX> 105 login
NX> 101 User: a3800436
NX> 102 Password:
NX> 103 Welcome to: EECEEDA01 user: a3800436
NX> 105 listsession --user="a3800436" --status="suspended,running" --geometry="1280x1024x32+render+fullscreen" --type="unix-gnome"
NX> 127 Sessions list of user 'a3800436' for reconnect:

Display Type Session ID Options Depth Screen Status Session Name
------- ---------------- -------------------------------- -------- ----- -------------- ----------- ------------------------------


NX> 148 Server capacity: not reached for user: a3800436
NX> 105 startsession --link="lan" --backingstore="1" --cache="16M" --images="64M" --media="0" --session="eeceeda01" --type="unix-gnome" --geometry="1280x962" --fullscreen="1" --kbtype="pc102/gb" --screeninfo="1280x1024x32+render+fullscreen"

NX> 1000 NXNODE - Version 1.5.0-60 OS (GPL)
NX> 700 Session id: EECEEDA01-1003-CF98F0CA710F1B93052F20E16DE59C9B
NX> 705 Session display: 1003
NX> 703 Session type: unix-gnome
NX> 701 Proxy cookie: c758eeddf07dfd2de5520001641afd26
NX> 702 Proxy IP: 10.64.226.2
NX> 706 Agent cookie: c758eeddf07dfd2de5520001641afd26
NX> 704 Session cache: unix-gnome
NX> 707 SSL tunneling: 0
NX> 105 NX> 596 Session startup failed.
NX> 1004 Error: NX Agent exited with exit status 1.
NX> 1006 Session status: closed
/usr/bin/nxserver: line 1190: 15448 Terminated sleep $AGENT_STARTUP_TIMEOUT
Can't open /var/lib/nxserver/db/running/sessionId{CF98F0CA710F1B93052F20E16DE59C9B}: No such file or directory.
mv: cannot stat `/var/lib/nxserver/db/running/sessionId{CF98F0CA710F1B93052F20E16DE59C9B}': No such file or directory
NX> 1001 Bye.
Killed by signal 15.
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I had tried to kill the previous job which i had accidentally didn't closed it properly but the symptom remain the same. Does anyone out there can help me?