Dock Property Not Visible in The Properties

Question

Could anyone throw some light on this.... I'm new to C# &.NET I'm working on MDIForms... I've set Child forms' Parent to be the MDIcontainer.. I'd set Dock property to be left...but somehow...it got changed and now i'm trying to set it right ...i dont find the Dock Property in the task panel.. if i try to set it on the run...its not workin...can someone please tell me whats cookin.. it would be great to get a reply fast ..as it's very urgent Thanks.., Freemason