Question about email.

I had my email account set up on my phone and I received every email and when the emails were delivered onto my PC they would be deleted automatically from my phone, no problems at all.

BUT, I just installed a new HDD on my PC and I set up my email account on it again and no issues at all on the PC, however on my phone I cant seem to delete the emails automatically. If I delete them manually, they are gone for a awhile and then I get hit with emails from the past 3 days and I have to get rid of them again?

Anyone know what is causing this? I have a Nexus One unrooted and my PC email program is Windows Live and I havent had the issue until I installed the new HDD. Maybe there is a setting I am missing on my PC's end? Or do I need to sync up or something? Kinda confused and any info would be appreciated.

Thank you.

 

It was already checked off in settings, so no dice there, but thank you. Hopefully I can figure it out.

 

Im sorry I didnt mention it, but I did try it with the setting checked both on and off and nothing.