Upgrade 7->8 Error "Type mismatch:"

Hello:

I am moving our forum from our old server to a new ISP account.  Our old server is on 7.9, new one is 8.05.  Both are MSSQL.

Per the upgrade instructions, I copied the database over, run the 7->8 upgrade tool (no errors), then uploaded the 8.05 files.  When I try to launch the forums, I get the error:

Microsoft VBScript runtime error '800a000d'

Type mismatch: 'saryDateTimeData'

/forum/functions/functions_date_time_format.asp, line 591

I thought something might have gotten corrupted, so I went through the entire process again and got the same result.  I have seen a few other posts mentioning this error, but have not seen a detailed fix.

Any help would be greatly appreciated -- thanks in advance!

Thanks for the reply --

I don't have access to the server, as this is an ISP account... unfortunately.  I did have the forums setup on this new account previously to test the migration from 7->8 (which worked fine), so then when it came time to go live I deleted everything (database, all forum files) and followed the same upgrade steps and now get the error I mentioned.

Thanks --

I changed the Const strAppPrefix to something else, and I get the same result.

I didn't run the upgraded database on v7... the only forum code that's been on the new site is v8.  I just transferred the tables over, ran the upgrade, then uploaded the v8 files.

Thanks again for your help