[Can I give 100% of impressions on a specific URL to a specific ad?]

Thanks Andrew, I will experiment with this.

[Can I give 100% of impressions on a specific URL to a specific ad?]

I've searched a lot and can't seem to find this answer, so I'm doubting that the functionality exists, but I'm asking in the hopes that maybe I've missed it somehow.

We've been using revive adserver for a few weeks and loving it. Some of our clients have requested that certain banners only show on certain pages of our site.

So, I'm using Delivery Limitations where Page URL is the URL they want targeted. That works, but it doesn't give 100% of the impressions on that page to that banner. When I checked the probabilities for that banner, it is always something low like 1.45%. These are low traffic pages (compared with the millions of impressions sitewide) and I want to give 100% of the impressions on these pages to these specific banners.

Is there a way that anyone knows of? I'd be very grateful for any help you could provide.

[Upgraded from 4.0.0 to 4.0.1 no plugins]

This exact thing is happening to me, as well, except I am running with a fresh install of 4.0.1.

Under Configuration/Maintenance/Plugins I see in a red box:

Client: is configured as installed but not found to exist 
Geo: is configured as installed but not found to exist 
Site: is configured as installed but not found to exist 
Time: is configured as installed but not found to exist 
oxCacheFile: is configured as installed but not found to exist 
oxMemcached: is configured as installed but not found to exist 

The issue is that much functionality is missing, and the plugins came in disabled by default. I was able to enable the six main plugins but the "Groups" plugins have several that are disabled and I cannot find a way to enable them. Clearly something is broken with this fresh install and I'm working to uncover where the problem is.

If it means anything, I am using Centos 7 which has an old version of php (5.3.3).