Not displaying next screen in N6600

Hai folks,

While deploying my J2ME appln to the N6600  device, as per my code ,first 
the 'Login Form' is displayed correctly.After clicking a commandbutton its 
not displaying the next screen (List component) which is the 'MainList' of 
my application .But its working good(dispalying 'Mainlist')  in emulator 
.But if i once exit the application and then again running it means ,its 
displaying the 'mainList' successfully .
can u plz suggest:    Why its not going to next screen for the very first 
time only. What should do to resolve this problem.

                   if(command==save)
                    {
                   
if(loginpass.getString().compareTo(loginrepass.getString())==0){
                    rms.loginSave(loginpass.getString());
                    showAlert("save screen","Password 
saved",resources.IMAGE_SAVE,"0");// info is set here
                    display.setCurrent(info,optionlist);//after saving 
password only mainscreen is displayed
                    }

                      * where     info       =  new 
Alert(alerthead,alertvalue,Image.createImage(alertimg),AlertType.ALARM);
                                    optionlist  = 'Mainlist' which is to be 
displayed.

Thanks in advance
regards
yafy.