Port format Error

I amtrying to send sms using WMA but i am getting the following Error:

java.lang.IllegalArgumentException: Port format

at com.sun.midp.io.j2me.sms.Protocol.openPrimInternal(+281)

at com.sun.midp.io.j2me.sms.Protocol.openPrim(+8)

at javax.microedition.io.Connector.openPrim(+299)

at javax.microedition.io.Connector.open(+15)

at javax.microedition.io.Connector.open(+6)

at javax.microedition.io.Connector.open(+5)

at com.kraysis.NokiaSMSSolution.Test.WMATester.startApp(+27)

at javax.microedition.midlet.MIDletProxy.startApp(+7)

at com.sun.midp.midlet.Scheduler.schedule(+270)

at com.sun.midp.main.Main.runLocalClass(+28)

at com.sun.midp.main.Main.main(+116)

[735 byte] By [Atiqea] at [2007-11-27 2:41:42]