xcode for NSURL connection with PHP and database (online)

Question

i am creating a register and login form in XCode.. have four textfields 1. nameText 2. MessageText 3. emailidText 4. passwordText

it was running good when i have first 2 fields and when i added emailid and password TExts, mysql database table is updated like all textfields in one cell.for Example

1. nameText - selva
2. MessageText - hello
3. emailidText - abc@abc.com
4. passwordText - xxxxxx

it update like selva?message=hello?emailid=abc@abc.com?password=xxxxxx on the name cell and rest of the 3 cells in table are empty...

i checked my PHP by creating HTML file and linked to it, it is working very fine. NOTE: i am working on online HOSt and online MYSQL database....

this is what i am declared in my viewcontroller.m

-(void)postMessage:(NSString*) message withName:(NSString *) name withName:     (NSString*)emailid withName:(NSString *)password 



{
if (name !=nil && message != nil && emailid !=nil && password !=nil)
{
    NSMutableString *postString = [NSMutableString stringWithString:kpostURL];


    [postString appendString:[NSString stringWithFormat:@"?%@=%@", kName, name]];


    [postString appendString:[NSString stringWithFormat:@"?%@=%@", kMessage, message]];

    [postString appendString:[NSString stringWithFormat:@"?%@=%@", kemailid, emailid]];

    [postString appendString:[NSString stringWithFormat:@"?%@=%@", kpassword,  password]];

    [postString setString:[postString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

    NSMutableURLRequest *request=[[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:postString]];
    [request setHTTPMethod:@"POST"];

    postConnection =[[ NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];



}
}

-(IBAction)post:(id)sender
{
 [self postMessage:messageText.text withName:nameText.text withName:emailidText.text  withName:passwordtext.text];

passwordtext.text= nil;
messageText.text= nil;
nameText.text = nil;
emailidText.text=nil;

}

created macros in viewcontroller.h and declared the four fields too..

i dont know why i am getting my o/p of all the four fields in one cell??

can anyone help me to clear my error please..