qxtpop3 error 4 ssl yahoo

we have tried 2 access various email accounts with qxtpop3. we were successful 4 a ssl-secure yahoo-account only @ 1 of 3 computers. there are 3 pictures & 4 source files in the attachments. the pictures show the results of of the testing code on the 3 machines.

the problem exists only 4 the yahoo-account. greetings from austria richard kofler & company netconnect