after i a choose js jobs login's position it says
Notice: Use of undefined constant DS - assumed 'DS' in C:\wamp\www\modules\mod_jsjobslogin\mod_jsjobslogin.php on line 17
Call Stack
# Time Memory Function Location
1 0.0005 378472 {main}( ) ..\index.php:0
2 0.1698 8639288 JSite->render( ) ..\index.php:58
3 0.1803 8962712 JDocumentHTML->render( ) ..\application.php:279
4 0.1804 8962712 JDocumentHTML->_renderTemplate( ) ..\html.php:462
5 0.2005 9297808 JDocumentHTML->getBuffer( ) ..\html.php:682
6 0.2005 9298128 JDocumentRendererModules->render( ) ..\html.php:399
7 0.2027 9298656 JDocumentRendererModule->render( ) ..\modules.php:39
8 0.2029 9300600 JModuleHelper::renderModule( ) ..\module.php:107
9 0.2051 9355968 include( 'C:\wamp\www\modules\mod_jsjobslogin\mod_jsjobslogin.php' ) ..\helper.php:176

( ! ) Warning: require_once(C:\wamp\www\modules\mod_jsjobsloginDShelper.php) [<a href='function.require-once'>function.require-once</a>]: failed to open stream: No such file or directory in C:\wamp\www\modules\mod_jsjobslogin\mod_jsjobslogin.php on line 17
Call Stack
# Time Memory Function Location
1 0.0005 378472 {main}( ) ..\index.php:0
2 0.1698 8639288 JSite->render( ) ..\index.php:58
3 0.1803 8962712 JDocumentHTML->render( ) ..\application.php:279
4 0.1804 8962712 JDocumentHTML->_renderTemplate( ) ..\html.php:462
5 0.2005 9297808 JDocumentHTML->getBuffer( ) ..\html.php:682
6 0.2005 9298128 JDocumentRendererModules->render( ) ..\html.php:399
7 0.2027 9298656 JDocumentRendererModule->render( ) ..\modules.php:39
8 0.2029 9300600 JModuleHelper::renderModule( ) ..\module.php:107
9 0.2051 9355968 include( 'C:\wamp\www\modules\mod_jsjobslogin\mod_jsjobslogin.php' ) ..\helper.php:176

( ! ) Fatal error: require_once() [<a href='function.require'>function.require</a>]: Failed opening required 'C:\wamp\www\modules\mod_jsjobsloginDShelper.php' (include_path='.;C:\php\pear') in C:\wamp\www\modules\mod_jsjobslogin\mod_jsjobslogin.php on line 17
Call Stack
# Time Memory Function Location
1 0.0005 378472 {main}( ) ..\index.php:0
2 0.1698 8639288 JSite->render( ) ..\index.php:58
3 0.1803 8962712 JDocumentHTML->render( ) ..\application.php:279
4 0.1804 8962712 JDocumentHTML->_renderTemplate( ) ..\html.php:462
5 0.2005 9297808 JDocumentHTML->getBuffer( ) ..\html.php:682
6 0.2005 9298128 JDocumentRendererModules->render( ) ..\html.php:399
7 0.2027 9298656 JDocumentRendererModule->render( ) ..\modules.php:39
8 0.2029 9300600 JModuleHelper::renderModule( ) ..\module.php:107
9 0.2051 9355968 include( 'C:\wamp\www\modules\mod_jsjobslogin\mod_jsjobslogin.php' ) ..\helper.php:176
How can i solve this?

And also i couldnt figure out how to put newest jobs in index page joomla 3.0