Outlook 2007: Send To Mail Recipient from Explorer produces error

Dear all,
since lately, when I right click on a file in an explorer window to send it via e-mail via the  Send To Mail Recipient function, I receive an error message saying that the outlook.ost (i'm using an exchange server) cannot be accessed because it is being used by another process. This occurs when Outlook 2007 is already running (but this used to work in past, so this is not the issue).
When Outlook is closed and I use  Send To Mail Recipient, NOTHING happens.

Likewise, I cannot include attachments to a new email message by dragging the file from the explorer and dropping it on the message window. This also used to work flawlessly.

What "major change" did I have lately? I just had windows rebuild all my indexing (through the control panel), since outlook did not found all relevent elements in a search anymore.

I'm using Outlook 2007 and Windows 7 64-bit, both up-to-date.

Thanks for any helpful suggestions.
Rob
LVL 3
robofixAsked:
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Sector5Commented:
Hi robofix,

Have a look at this, it might solve your problem:

http://windowsxp.mvps.org/sendtomail.htm
0
robofixAuthor Commented:
sorry, that didn't help
the first command indicated there, regsvr32 sendmail.dll, produces an error.
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KMLCCKCommented:
Click  Start Search On Start Menu and then type shell:sendto Enter open Sendto Location
And then Apply This steps
http://support.microsoft.com/kb/234487/en-us

I hope so fix this steps.
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KMLCCKCommented:
I forgot this
New Shortcut on 64 Bit Systems
"C:\Program Files (x86)\Microsoft Office\Outlook.exe" /c ipm.note
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