Straight up broken

I just installed the latest release (at www.szteachers.com) & there isn't one thing about it that works correctly. I had an earlier release that simply wouldn't make ads "active" after they'd been created, but I uninstalled it & installed the latest version in hopes that it would fix the problem. Now, this is what's happened:
1) Yes, it's all been enabled with permissions correct....Drupal 5.1...latest release of the ad module
2) When I create an ad (any ad, be it text or image, I've tried both) & hit submit, one of two things happens. If it's a text ad, it says ad created, but then there's no ad. At all. When I create an image ad, I receive this message:
Image validation failed, unable to mark ad as active. Setting ad as pending. If you do not see any more errors, you should now be able to set your ad as active.

With both problems, when I go back & edit the ad, none of the previously typed in information is there, but has been replaced by this question between Input Format and the pending/active selection box:
Style of ad: *
image
text
Select the type of ad that you wish to create from the above options.

3) I've enabled embedded ads on every page of my site, as well as run the module-provided blocks for all active text/image ads. When enabled, the blocks say "No ads found". Nothing appears in the main content area at all.

4) Under Administration/Content Management/Ads/List....no ads are listed, though I've attempted creating three or four.

5) When I search the page source for adserve.php to debug the whole thing, adserve.php doesn't show up at all in the page source....which is strange because I ran it just fine with the previous release I had installed. So my apologies for not being able to give an accurate debug report. I can, however, provide this:

6) When I check my log report, two things of note pop up. First, this one, which seems to be quite inaccurate:
Type content
Date Thursday, October 18, 2007 - 13:34
User Admin
Location http://www.szteachers.com/?q=node/add/ad/text
Referrer http://www.szteachers.com/?q=node/add/ad/text
Message ad: added Ad here.
Severity notice
Hostname 222.125.72.100

........2nd being this one, which shows up repeatedly, once for every page hit....
Type php
Date Thursday, October 18, 2007 - 13:34
User Admin
Location http://www.szteachers.com/?q=node/95
Referrer http://www.szteachers.com/?q=node/add/ad/text
Message Table 'szteach_mysql.ads' doesn't exist query: SELECT * FROM ads WHERE aid = 95 in /hsphere/local/home/szteache/szteachers.com/includes/database.mysql.inc on line 172.
Severity error
Hostname 222.125.72.100

If there's any other information I can provide, I'd be more than happy to. I've been struggling with this thing all day today & it's killing me. Thanks so much for any help you can offer...I really look forward to getting this working.

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JD