SSL Error in Connection to Server through iPhone

I am trying to establish a HTTPS connection to a server using my app. But the connection fails due to following error

Error Domain=NSURLErrorDomain Code=-1200 "An SSL error has occurred and a secure connection to the server cannot be made." UserInfo=0x612eb30 {NSErrorFailingURLStringKey=https:myURL.com/signup, NSLocalizedRecoverySuggestion=Would you like to connect to the server anyway?, NSErrorFailingURLKey=https:myURL.com/signup, NSLocalizedDescription=An SSL error has occurred and a secure connection to the server cannot be made., NSUnderlyingError=0x612eb70 "An SSL error has occurred and a secure connection to the server cannot be made."}

The code to connect to server is

-(IBAction) handleEvents:(id)sender
 {
    if ((UIButton*)sender == submit) {

    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;


    NSLog(@"Begin");
    NSData *urlData;
    NSURLResponse *response;
    NSError *error;

    NSString *url =[[NSString alloc]initWithFormat:@"%@signup",baseURL];
    NSURL *theURL =[NSURL URLWithString:url];
    NSMutableURLRequest *theRequest =[NSMutableURLRequest requestWithURL:theURL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:0.0f];
    [theRequest setHTTPMethod:@"POST"];
    NSString *theBodyString = [NSString stringWithFormat:@"emailId=%@&mobileNumber=%@&appId=%@&password=%@&firstName=%@&lastName=%@"
                               ,@"abc@example.com",@"919879876780",@"bf1c7a6b3d266a7fe350fcfc4dda275211c13c23" ,@"qwerty" , @"Dev" , @"Sri"];
    NSData *theBodyData = [theBodyString dataUsingEncoding:NSUTF8StringEncoding];

    [theRequest setHTTPBody:theBodyData];
    urlData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&response error:&error];
    }
}

my delegate methods are

- (void)handleError:(NSError *)error
{
NSLog(@"----->%@",error);
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
  [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;   

 }

- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace {
    return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];
   }

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge (NSURLAuthenticationChallenge *)challenge {  
    NSLog(@"check auth");
    [challenge.sender continueWithoutCredentialForAuthenticationChallenge:challenge];
   }

I am stuck over here and could not find any way out.

Any form of help would be greatly appreciated.

thanks in advance!!