iphone - NSMutableURLRequest sends once on localhost, but twice on web -

hey everbody, im getting trouble here. have button makes connection php, updating database. well, im getting curious problem here.

when set update local db, sends data 1 time. but, when set test on web, updates twice.

same error giving me error message. local doesnt gives me, online does.

why?

thanks! here goes code:

    nsmutableurlrequest *request =      [[nsmutableurlrequest alloc] initwithurl:      [nsurl urlwithstring:@"http://localhost/dev/mcomm/pedido.php"]];      [request sethttpmethod:@"post"];     nsstring *poststring = [[nsstring alloc] initwithformat:@"nome=%@&email=%@&endereco=%@&produto=%@&marca=%@&preco=%@&codigo=%@&variacao=%@&parcelas=%@&valorparcelas=%@&cartao=%@&numcartao=%@&codcartao=%@&venccartao=%@&nomecartao=%@", self.shareddata.datanome, self.shareddata.dataemail, endereco, self.shareddata.dataprod, self.shareddata.datamarca, self.shareddata.datapreco, self.shareddata.datacodigo, self.shareddata.datavariacao, parcelanum.text, parcelaresultante.text, self.shareddata.cartao, numerodocartao.text, codigodocartao.text, validadecartao.text, impressocartao.text];      nslog(@"enviado");       [request sethttpbody:[poststring                            datausingencoding:nsutf8stringencoding]];      //[request setvalue:@"application/x-www-form-urlencoded" forhttpheaderfield:@"content-type"];       [uiapplication sharedapplication].networkactivityindicatorvisible = yes;        //get response     nshttpurlresponse* urlresponse = nil;       nserror *error = [[nserror alloc] init];       nsdata *responsedata = [nsurlconnection sendsynchronousrequest:request returningresponse:&urlresponse error:&error];       nsstring *result = [[nsstring alloc] initwithdata:responsedata encoding:nsutf8stringencoding];      [self.view addsubview:loadingrequest];     loadingrequest.backgroundcolor = [uicolor clearcolor];     loadingrequest.center = self.view.center;      nslog(@"response code: %d", [urlresponse statuscode]);     nslog(@"res: %@", result);       if ([urlresponse statuscode] > 400) {          uialertview *alert = [[uialertview alloc]                                initwithtitle:@"erro"                               message:@"falha ao conectar com o servidor."                                delegate:nil                                cancelbuttontitle:@"ok"                                otherbuttontitles:nil];          [uiapplication sharedapplication].networkactivityindicatorvisible = no;          [alert show];         [alert release];      }     else if ([result isequaltostring:@"erro"]) {          uialertview *alert = [[uialertview alloc]                                initwithtitle:@"erro"                               message:@"não foi possível realizar seu pedido. tente novamente mais tarde."                                delegate:nil                                cancelbuttontitle:@"ok"                                otherbuttontitles:nil];         [uiapplication sharedapplication].networkactivityindicatorvisible = no;          [alert show];         [alert release];     }     else {          finalizarviewcontroller *telafinal = [[[finalizarviewcontroller alloc] initwithnibname:                                                nsstringfromclass([finalizarviewcontroller class]) bundle:nil] autorelease];          [self.navigationcontroller pushviewcontroller:telafinal animated:yes];         [self navigationcontroller].navigationbarhidden = yes;          [uiapplication sharedapplication].networkactivityindicatorvisible = no;          [self.loadingrequest removefromsuperview];      }