I can't bring up the KAIO on IDS 7.30 under SCO Open Server.

Hi list. I got serious prolems when I brought up the KAIO on IDS 7.31 under SCO Openserver. I did that: First. I made two simple partition using SCO Virtual Disk Manager, they was: /dev/rdsk/vdisk4 and /dev/rdsk/vdisk5 Second, I read the release note and I set up the kernel parameter. Also, I set up the SCO AIO and suds drivers ( I'm not realy sure about suds is right ). I tested the AIO Driver using aioinfo from sco and I got that (like root ): # aioinfo total aio_info slots 5 active aio_info slots 0 number of memory locks 0 total locked memory 0 total ureq structures 120 active ureq structures 0 free ureq structures 120 cumulative ureq usage 0 maximum ureq usage 0 total aio buf structures 120 free aio buf structures 120 but I tried using informix I got: >aioinfo open '/dev/rroot' failed 13 After, I configured the instance, but when I tried to start. >oninit -vChecking group membership to determine server run modesucceeded Reading configuration file '/usr/informix/etc/onconfig.desai'...succeeded Creating /INFORMIXTMP/.infxdirs ... succeeded Creating infos file "/usr/informix/etc/.infos.desai" ... "/usr/informix/etc/.con Writing to infos file ... succeeded Checking config parameters...succeeded Allocating and attaching to shared memory...succeeded Creating resident pool 9910 kbytes...succeeded Creating buffer pool 40002 kbytes...succeeded Initializing rhead structure...succeeded Initializing ASF ...succeeded Initializing Dictionary Cache and Stored Procedure Cache...succeeded Bringing up ADM VP...succeeded Creating VP classes...succeeded Onlining 1 additional cpu vps...succeeded Onlining 1 IO vps...succeeded Forking main_loop thread...succeeded Initialzing DR structures...succeeded Forking 1 'ipcshm' listener threads...succeeded Forking 1 'tlitcp' listener threads...succeeded Starting tracing...succeeded Initializing 4 flushers...succeeded oninit: Fatal error in shared memory initialization And in the online.log appears 16:18:34 Event alarms enabled. ALARMPROG = '/usr/informix/comun/event.sh' 16:18:39 DR: DRAUTO is 0 (Off) 16:18:39 Requested shared memory segment size rounded from 280KB to 4096KB 16:18:40 Informix Dynamic Server Version 7.30.UC2 Software Serial Number AAC#J466745 16:18:40 KAIO: error in kaio_READ, kaiocbp = 8548616c, errno = 14 16:18:40 fildes = 4 (gfd 3), buf = 829b7800, nbytes = 2048, offset = 102400 16:18:40 I/O read chunk 1, pagenum 0, pagecnt 1 --> errno = 14 16:18:40 Informix Dynamic Server Stopped. 16:18:40 mt_shm_remove: WARNING: may not have removed all/correct segments In last, I unset the KAIOON enviorement variable and tried again. at this time, the instance got online. What happend ? How can I fix this problem? How to set up KAIO on sco? Thanks a lot. for your attention.