Temporary Immunization

When I run an immunization check, I get this message:

"221930 of 221934 entries are already immunized, but 4 are still unprotected!"

Then I apply immunization, after which I get this message:

"All 221934 entries are immunized!"

Then I exit Spybot, relaunch Spybot, and run immunization again. Afterwards, this is the message Spybot displays:

"221930 of 221934 entries are already immunized, but 4 are still unprotected!"

Then I apply immunization again, which results in this message:

"All 221934 entries are immunized!"

Each time I repeat this sequence of actions, I get the same results. I am running Spybot as the Administrator. I am using Spybot 2.4. My OS is 32 bit Windows Vista. Is there any more information that Safer-Networking would like me to provide?