Oracle 10Gr2 and EM(agent) problem(s)

Hoj!

Running Oracle 10gR2 on SuSE Linux Pro. 10. Oracle Installation went OK.
Then I create two instances with "dbca" (included EM) ... all OK.

 From a client (browser) the EM console seems to work ... but I'm bothered with the server error/warning messages ... saying:
==> emagent.log <==

2006-02-09 13:12:53 Thread-16384 target {ORC10.rais.local, oracle_database} is broken: cannot compute dynamic properties in time. (00155) 2006-02-09 13:12:54 Thread-16384 EMAgent started successfully (00702) --- +
==> emagent.trc <==

2006-02-09 13:12:53 Thread-16384 ERROR TargetManager: TIMEOUT when compute dynamic properties for target ORC10.rais.local 2006-02-09 13:12:53 Thread-16384 ERROR TargetManager: target {ORC10.rais.local, oracle_database} is broken: cannot compute dynamic properties in time.
2006-02-09 13:12:53 Thread-16384 WARN collector: the column name DiskActivityavwait in this condition does not exist 2006-02-09 13:12:54 Thread-180231 ERROR upload: Error in uploadXMLFiles. Trying again in 60.00 seconds.

---
... when I start EM console.
Why? How?

I also notice in "top" the process "emagent" is very busy ...:
---
Tasks: 169 total,   3 running, 166 sleeping,   0 stopped,   0 zombie
Cpu0  : 53.3% us, 46.4% sy,  0.0% ni,  0.0% id,  0.0% wa,  0.3% hi,  0.0% si
Cpu1  :  0.3% us,  0.3% sy,  0.0% ni, 99.3% id,  0.0% wa,  0.0% hi,  0.0% si
Mem:   2050660k total,  2019732k used,    30928k free,   118300k buffers
Swap:  2104472k total,   348860k used,  1755612k free,  1293428k cached

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
22122 oracle    25   0 70492  10m 5488 R 99.9  0.5  36:18.08 emagent
...
---

I was checking the doc., Internet forums ... and can't find any good
explanation for this.
Any Idea/Advice?

-- 
Lp, BostjanSt