Nokia :: N86 - Automatic Email Retrieval Asks About Connection Every Time

I set up a Gmail mailbox on my N86 phone using e-mail wizard (IMAP). It works fine in connecting to the Gmail, and send/receive e-mails. But my problem is with automatic retrieval; every time it wants to check my mailbox, it asks me to choose access point. That means automatically retrieval acts just like manual retrieval because if I am not there when it is trying to retrieve e-mails, it won't connect, so when I come to my phone, I just see a "Select connection" box giving me three options:

Search for WLAN Internet WAP services. My phone settings regarding to Access Point and Email configuration are as below:

Settings > Connection > Packet Data > Packet Data Connection > When Available
Settings > Connection > Destinations > Internet > 1 access point (default destination)

My access point setting says "Use access point = Automatically"
E-mail settings > Global settings : there is no configuration for access point or connection. The available options in this page:
1- Message list layout
2- Body text preview
3- Title dividers
4- Download notifications

E-mail settings > Mailbox settings:
Mailbox settings > My email address Mailbox name. My name Signature Advanced mailbox settings.
What to sync > Retrieve less than 2 KB Emails to retrieve IMAP4 folder path Folder subscriptions.
When to sync > Connection daysConnection hoursUpdate intervalRetrieve when abroad.

I listed my available settings because I noticed different options in different tutorials. Even my phone's manual has some different options than my phone. I didn't list WLAN options because I don't have any WLAN network. So to make it short, I want my phone to retrieve e-mails from my GMail account automatically, without asking me about connection and access point each time. BTW, my phone's web browser works fine, and makes connection when needed without asking me about the access point to use. I hope someone can suggest me a solution because I like this e-mail application in my new phone, but it is strange to me that it cannot use the default access point and always needs to ask me.