Time change when pop mail by outlook express

when I access mailfile directly with domino admin, it is show correctly such as 1 PM

but I use outlook express to pop mail from domino

the time that stamp in mail will change to 8 PM (+7 hours)

now is 1 PM

I check regional setting in control panel and timezone in date & time property already . both are correct(already set to all Thai)

Will it must change in registry??

but I don’t know where to change it

any suggestion for this case

Ps. My country is thailand,

so it must set GMT +7 hours bangkok normally