Article ID: 934588 - Last Review: May 14, 2007 - Revision: 1.1

Error message when you try to use a dial-up connection in Windows Internet Explorer 7 on a Windows Vista-based computer: "Cannot write to the telephone book"

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SYMPTOMS

On a Windows Vista-based computer, you try to connect to a network by using a dial-up connection in Windows Internet Explorer 7. However, you may receive an error message that resembles the following:

Cannot write to the telephone book.
Error 624 : Telephone book file cannot be updated.

The dial-up connection attempt is unsuccessful.

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CAUSE

This behavior occurs if Internet Explorer 7 is running in protected mode. Specifically, this behavior occurs because some registry subkeys are restricted when you enable protected mode in Internet Explorer 7.

Note By default, protected mode is enabled in Internet Explorer 7.

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WORKAROUND

To work around this behavior, start the dial-up connection before you start Internet Explorer 7. To do this, follow these steps:

Click Start
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, and then click Connect to.
Click Set up a connection or network.
Click Set up a dial-up connection, and then click Next.
Type the necessary information for the dial-up connection, and then complete the connection.
After the dial-up connection is active, start Internet Explorer 7.