Service tax liability

Dear Sir ,

My firm name is XYZ , It is a proprietorship firm/HUF . My
firm is doing stiching and printing work  at closely held limited
company . My Firm  is raising monthly bills towards stiching and
printing work , and company is making payment after deducting TDS .

Please let me know is there any service tax liability  either on mr or
on company , company is registered at Excise Department and is paying
excise duty on its product.

My firm is also doing loading and unloading work in another public
limited company My Firm  is raising monthly bills towards loading  ,
and company is making payment after deducting TDS .

Please let me know is there any service tax liability either on me or
on company , company is registered at Excise Department and is paying
excise duty on its product.