Problems with the ScriptingBridge email message forwarding

[Alec]

Hello, I'm going to develope own email- plugin included to my application. At the moment I have a problem with the email forwarding to the third user. There is the code snippet:

EmailApplication.h

MailApplication *mail;
@property(nonatomic, retain) MailApplication *mail;



EmailApplication.m
@synthesize mail

-(void)loadAllEmails{
self.mail = [SBApplication applicationWithBundleIdentifier:@”com.apple.Mail”];
}

-(void)acceptMessageForwardingMailMessage *)message ToNSString *)address{
message.readStatus = YES;

MailOutgoingMessage *forwardMessage = [message forwardOpeningWindow:NO];

[[mail outgoingMessages] addObject: forwardMessage];

MailToRecipient *theRecipient = ….

...
}

The problem is that every time when I'm trying to add forwardMessage to the outgoingMessages- array, application crashes with the output -[SBElementArray addObjecy:]: can't add an object that already exists.

(MailMessage *)message is ok so the problem is in somewhere else.
I have noticed that the same error comes with the email sending script when allocating the new MailOutgoingMessage and changing the classForScriptingClass text from the outgoing message to the another.
Do I need some another parameters? Or do I have to do forwarding by another way?