impresssion hit doesn't count

<img src="">
<img src="">
<img src="">

the 3rd is my code....why it doesn't reload ?
but the first 2 codes are always reload ...

that why my impression log doesn't same the above 2 services.
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TYoungConnect With a Mentor Commented:
When you print out the banner's header, place a Expires: header with it... such as:

print "Content-type: image/gif\n";
print "Expires: now\n\n";

Hope that helps.
tong111797Author Commented:
thank you very much...
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