.jar file reusablility issue in oracle forms

Question

hello all
i am using oracle forms
{code}
Forms [32 Bit] Version 10.1.2.0.2 (Production)
Oracle Toolkit Version 10.1.2.0.2 (Production)
PL/SQL Version 10.1.0.4.2 (Production)
Oracle Procedure Builder V10.1.2.0.2 - Production
{code}
and using Database 10g
{code}
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
{code}
i am developing an application in oracle forms that sends message through GSM mobile when any transaction is commited.
i wrote a class in java , made .jar file , edited default.env file CLASSPATH = "my .jar file"
everything is working fine when i am trying the code in NETBEANS IDE, it sends messages again and over again with no delay..
PROBLEM:
the problem is that when i try to send message from oracle forms using that JAR file , it sends message for only single time , after that it neither shows me any error nor sends the message,
(1) can it be problem of closing COM port for reusablity.
(2) any other way to reuse the jar file.
(3) should i program to closo the used port. (but java program is working very well in NETBEANS IDE).
please suggest me what should i do to reuse .jar file again and over again.
thanks

Answer 1

thanks for your reply.
sorry if forgot to mention that how i am using this java code.
yes! i am using that java code using Java Importer in oracle forms 10g.
importing that jar file i used PL/SQL code to use the static public veriables in oracle forms
Procedure Send_Message(
    Cel_N In Varchar2
Is
  Ora_Obj Ora_Java.Jobject;
  Com_P    Varchar2(10);
  Cent_No  Varchar2(100);
  Send_Sms Number;
  Mesg     Varchar2(200);
Begin
  Ora_Obj := Smsclient.New(1);
  Smsclient.Setcomportname(Com_P);
  Smsclient.Setmsgcenternum(Cent_No);
  Send_Sms:= Smsclient.Sendmessage(Ora_Obj,Cel_N,Mesg);
Exception
When Ora_Java.Java_Error Then
  Message(Ora_Java.Last_Error);
When Others Then
  Message(Sqlerrm);
End;
this Smsclient.Sendmessage Class is working very well in both plateforms in NETBEANS IDE and oracle forms but the difference is in this class that
in NETBEANS IDE (when i run this class using F6 ) it works every time with no delay
but when i use this same class in pl/sql code through oracle forms it works only for one time.
COM ports and GSM modem is working property but why .jar file works for once.. and when i restart OC4J & oracle form at run time then it works for only once , meanse after starting OC4J i am able to send message through mobile for one time, means .jar file works only once, why not every time i call the class through oracle form..
what should i check .. please..
thanks