iphone - Unable to upload video longer than 1 minute -

i working on application require video upload functionality. using nsurlrequest , working fine video less 1 minute in length, cause problem when video large. 1 have idea that???

nsmutableurlrequest *request = [[nsmutableurlrequest alloc] init]; [request seturl:[nsurl urlwithstring:urlstring]]; [request setcachepolicy:nsurlrequestuseprotocolcachepolicy]; [request sethttpmethod:@"post"];  nsstring *boundary = @"----f00"; nsstring *contenttype = [nsstring stringwithformat:@"multipart/form-data; boundary=%@",boundary]; [request addvalue:contenttype forhttpheaderfield:@"content-type"];  filedata = [nsdata datawithcontentsofurl:[mediadict objectforkey:uiimagepickercontrollermediaurl]]; [body appenddata:[[nsstring stringwithformat:@"\r\n--%@\r\n", boundary] datausingencoding:nsutf8stringencoding]]; [body appenddata:[[nsstring stringwithformat:@"content-disposition: form-data; name=\"data[file_name]\"; filename=\"%@\"\r\n", filename] datausingencoding:nsutf8stringencoding]]; [body appenddata:[[nsstring stringwithformat: @"content-type: %@\r\n\r\n",filecontenttype] datausingencoding:nsutf8stringencoding]]; [body appenddata:filedata];  [request sethttpbody:body];  nsurlconnection *theconnection=[[nsurlconnection alloc] initwithrequest:request delegate:self];  if (theconnection) {      // create nsmutabledata hold received data.      // receiveddata instance variable declared elsewhere.      self.receiveddata = [nsmutabledata data];  } else {     // inform user connection failed.     uialertview *didfailwitherrormessage = [[uialertview alloc] initwithtitle: @"nsurlconnection " message: @"didfailwitherror"  delegate: self cancelbuttontitle: @"ok" otherbuttontitles: nil];     [didfailwitherrormessage show];     [spinnerview removefromsuperview]; } 

i appreciate friends.

set timeout interval , check whether working or not

nsmutableurlrequest *request = [[nsmutableurlrequest alloc] init]; [request seturl:[nsurl urlwithstring:urlstring]]; [request setcachepolicy:nsurlrequestuseprotocolcachepolicy]; [request sethttpmethod:@"post"]; [request settimeoutinterval:6000];