Subcategories not showing?

[hasnaat1]

I have version 1.5.0.5 that i downloaded yesterday, i'm still using default theme. I want my main root catogery to show all the sub catogeries when i click on it. Currently it shows nothing.

 

 

 

This is how i want my catogeries to be.

 

Heating & Plumbing: (Root catogery)

Heating (sub category 1)

Radiators (sub category 2)

Boilers (sub category 2)

 

Plumbing (sub category 1)

Tools (sub category 2)

Fittings (sub category 2)

 

 

Thanks.

 

PS: to be clear, there is a picture attached