MixW on Vista : running on a fragile glass

2009 CQ World-Wide WPX Contest, RTTY

Callsign: YB2ECG
Category-Operator: SINGLE-OP
Category-Transmitter: ONE
Category-Band: 20M
Category-Power: LOW
Category-Assisted: NON-ASSISTED
Name: SARDJANA
Postal Address: PLAMONGAN INDAH BLOK H3/19, SEMARANG 501
Log Deadline: 2009-03-15 23:59:59 UTC
Received at: 2009-02-17 13:04:43 UTC
Reported QSOs: 151
Confirmation #: 1132989.cq-wpx-rtty

Thank you for entering the contest and submitting your log in Cabrillo format. Please review the information listed above and, if necessary, resubmit the log to make any corrections.

73.

Ed Muns, W0YK
Contest Director

That's the confirmation from the Contest Robot, and I feel that this is my lowest achievement on CQ WPX RTTY series.
Using MixW on Vista like running on the fragile glass. Yes, it's true, I stil don't know why, it behave strange on Vista. When I edited the log such as adding the Zero on the exchange number, sudenly the log lost and disappear. I found this behaviour twice, firstly on WW EPC PSK125 last week and now on CQ WPX RTTY.
Fortunately previously I could find the log on WW EPC but on CQ WPX RTTY; I have lost my 11 previous logs, though I've search them on temporary log, as I did on WW EPC!
But, the show must go on. Then, I create a new log, using another file instead of Mixw2.log.
Continuing then starting on the number 12. I realize that sure my UBN will be the worse but I did not want missing this great contest.
Another strange behaviour was also found; she can not grab the serial number although I've set it up on the contest setting. Probably error on the .dll file.
For me this is the worstest experience on the big contest.
I've to convert to temporary ADIF to keeping the log archive.
I've posted this problem on the MixW reflector but stil could not find the solution.
Maybe the best way is I should downgrade to XP SP2. It's logical choice 'cause I did not find any problem on this operating system.