Windows 7 32bit shared drives and file attachments in IE9 web mail will not attach

I have a Windows Pro 32bit PC that has multiple user ID's on it.  I also have a shared folder on it and have mapped a drive to it.  When I use IE9 to open web mail on AT&T site and try and attach a file from the mapped drive it states I don't have access rights to do this.  If I use FireFox it works great.

The user is an Administrator and has full rights to this shared folder.  I reset IE9 back to defaults and that did not help.

Can anyone tell me why IE9 will not work?
sambec22Asked:
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sambec22Connect With a Mentor Author Commented:
Here is the real solution to the problem:

Configure the EnableLinkedConnections registry value. This value enables Windows Vista or Windows 7 to share network connections between the filtered access token and the full administrator access token for a member of the Administrators group. After you configure this registry value, LSA checks whether there is another access token that is associated with the current user session if a network resource is mapped to an access token. If LSA determines that there is a linked access token, it adds the network share to the linked location.
To configure the EnableLinkedConnections registry value, follow these steps:
1. Click Start, type regedit in the Start Search box, and then press Enter.
2. Locate and then right-click the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Poli cies\System
3. Point to New, and then click DWORD Value.
4. Type EnablelinkedConnections, and then press Enter.
5. Right-click EnableLinkedConnections, and then click Modify.
6. In the Value data box, type 1, and then click OK.
7. Exit Registry Editor, and then restart the computer.
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Jeff PerkinsOwnerCommented:
Have you tried IE9 in compatability mode?
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archersloCommented:
Perhaps you're missing an update. This seems closely related:

http://support.microsoft.com/kb/2589171/en-us
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sambec22Author Commented:
No none of this worked.  IE9 states while attaching a file to web mail:
P:\ is not accessable
Network access denied
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Jeff PerkinsOwnerCommented:
Ok if you have checked to make sure there are no security updates, then you will need to switch to compatability mode before you log into your att account.  Do you know how to do this?
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sambec22Author Commented:
If your talking about IE Compatability mode I tried this before I logged in to the AT&T account and it did not work.
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Jeff PerkinsOwnerCommented:
Have you tried emailing att support to see if you could get any help from them?

I'm skeptical, but you never know when you might run into one of the few support people with the pride to do a good job.

Other than the security settings on your IE. You might try lowering the security, or setting it to default, or lowering it temporarily and test.  You might also try turning off protected mode. Not sure if it's related, but worth testing to find out.

If none of that works, I'm going to suggest using a work around, either a different browser, which makes me think it's a security setting, or perhaps, just copy the attachment to local drive before attaching, then delete or copy back.  Not sure how often you are doing this, so not sure how difficult it would be to use a work around.
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sambec22Author Commented:
No one else came up with this.
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