The hardware configuration:pci 82350 gpib - The instrument address:gpib0:11 - The resource string you ausing: gpib0:11:instr -The instrument tools such as MAX appears -the soft:labview6.1.When i install the soft ,i can use the visa to connect to serial,and the resource string such as " com1","com2"appear .when i install aglient's i/o library,i connect to the gpib card,the error-1073807195 appear.Then I copy the agilent's file:visa.dll and agvisa.dll to the directoy c:\winnt\system32,I can use the gpib card correctly, However ,i cannot find the string such as "com1" in the resource list,when i try to use the serial port. on the another hand,when use the MAX,I cannot find the gpib card,but use the aglient's i/o ,I can connect to other instrument . I want to use the serial port and GPIB at he same time in the labview enviorment ,what can i do?please tell me.thank you very much!