Firebird Datapump - 2 simultaneous connections

Hello, I have been using php --with-interbase for some time and I enjoy using php scripts to everything so I did some small scripts to use as a datapump to the interbase. My scripts relay on the fact that I can have two simultaneos connections to the different databases in order to pump data from one to another. Since I allways update my CGI version of php e also I am using the latest stable version of firebird, I believe that something has happend that changed the behavior of my php scrips. Now, when I do the second connection, everything looks like the second one takes command over the first one. I could verify this with some changes in my script. Does anyone knows about such behavior? I may post my script if anyone is interested, but there is nothing really special about it besides two connections to the interbase. By the way, I am using persistent connections. Please, any help would be appreciated. Thank you!