this is what the internet has posted about 424.
If you receive a message similar to "Run-time error '424': Object required." it means that the application has not been able to open the Windows File dialog box due to a problem in the Windows registry. This problem usually occurs when you are trying to open event files or People databases and have clicked on the Browse button.
To work around this you need ensure that the common dialog control (comdlg32.ocx) is correctly registered. To do this take the following steps.
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1. Click Start and select Run
2. Enter "regsvr32.exe comdlg32.ocx" (without the quotes)
If this does not correct the problem take the following steps.
1. Remove the application which had the problem using the Control Panel utility Add/Remove Programs
2. Reinstall the application
3. Click Start and select Run
4. Enter "regsvr32.exe comdlg32.ocx" (without the quotes)