Right click 'SuSe' (or K icon that opens your programs menu) and select 'Menu Editor', there you can see all submenus and applications within.

Now browse into the menu where your Konqueror launch is (by default 'Internet' - 'Web Browser' I think).

Once you find it, click its entry and you see details of the commands on the right. On 3rd box from top, paste the string (without quotes) and save the menu.

Remove the shortcut tab from taskbar by right-clicking it and select 'Remove... button'.

Right click taskbar again and select 'Add Application Button' and select Konqueror button from the menu. Now you have updated properties in it and it should work ok.

Other (more straightforward) option is for you just open the taskbar button's properties and paste the string to replace what you have there now (in the 'commands' box and without the quotes).