diff --git a/RedmineMobile/RedmineMobile/ViewControllers/OZLIssueCreateViewController.m b/RedmineMobile/RedmineMobile/ViewControllers/OZLIssueCreateViewController.m
index 6088eb3..dafed77 100644
--- a/RedmineMobile/RedmineMobile/ViewControllers/OZLIssueCreateViewController.m
+++ b/RedmineMobile/RedmineMobile/ViewControllers/OZLIssueCreateViewController.m
@@ -172,10 +172,11 @@
     issueData.status = _currentStatus;
     issueData.priority = _currentPriority;
     issueData.assignedTo = _currentUser;
-    issueData.projectId = _parentProject.index;
-
     if (_parentIssue) {
         issueData.parentIssueId = _parentIssue.index;
+        issueData.projectId = _parentIssue.projectId;
+    }else {
+        issueData.projectId = _parentProject.index;
     }
     issueData.description = _descriptionTextview.text;
     issueData.startDate = _startDateLabel.text;
@@ -315,6 +316,20 @@
     [self.tableView reloadData];
 }
 
+-(NSString*)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
+{
+    if (section == 0) {
+        NSString* tip ;
+        if (_parentIssue) {
+            tip = [NSString stringWithFormat:@"Add sub issue to #%d",_parentIssue.index];
+        }else {
+            tip = [NSString stringWithFormat:@"Add issue to project:%@",_parentProject.name];
+        }
+        return tip;
+    }
+    return @"";
+}
+
 #pragma mark -
 #pragma mark delegate of textfield inputview
 
diff --git a/RedmineMobile/RedmineMobile/ViewControllers/OZLIssueDetailViewController.m b/RedmineMobile/RedmineMobile/ViewControllers/OZLIssueDetailViewController.m
index c29be83..3f57049 100644
--- a/RedmineMobile/RedmineMobile/ViewControllers/OZLIssueDetailViewController.m
+++ b/RedmineMobile/RedmineMobile/ViewControllers/OZLIssueDetailViewController.m
@@ -30,6 +30,7 @@
 #import "OZLIssueHistoryViewController.h"
 #import "OZLIssueLogtimeViewController.h"
 #import "OZLSingleton.h"
+#import "OZLIssueCreateViewController.h"
 
 @interface OZLIssueDetailViewController ()
 
@@ -92,7 +93,11 @@
                 [self.navigationController pushViewController:history animated:YES];
             }break;
             case 1:{// add sub task
-                
+                UIStoryboard *tableViewStoryboard = [UIStoryboard storyboardWithName:@"OZLIssueCreateViewController" bundle:nil];
+                OZLIssueCreateViewController* creator = [tableViewStoryboard instantiateViewControllerWithIdentifier:@"OZLIssueCreateViewController"];
+                [creator setParentIssue:_issueData];
+                //[self.navigationController presentModalViewController:creator animated:YES];
+                [self.navigationController pushViewController:creator animated:YES];
             }break;
             case 2:{//logtime
                 UIStoryboard *tableViewStoryboard = [UIStoryboard storyboardWithName:@"OZLIssueLogtimeViewController" bundle:nil];