toaran

hi i use some rs232 ports to comunicate with microcontrollers .... my init parts looks like this : my problem is that if i start that vi i can read from any port i configured...(max 12) but i can write only to some of the com ports.. and everytime i restart the vi there are different ports ... i got no errors nothing .. with a port monitor on the same PC i see that the data is send as it should be ... but i tested it with a terminal program and a different PC and it seems that i only receive a CR/LF but not the data ... has anyone a idea what my problem is ? i hope i could describe my problem ... Toaran