Could someone please help with my backlink strategy.

http://ezinearticles.com/?Why-Is-It-...nt?&id=7197339

http://ezinearticles.com/?Why-Compan...ny?&id=7331169

http://ezinearticles.com/?Why-Should...ce?&id=7335259

http://ezinearticles.com/?Why-Is-It-...ce?&id=7332160

I was wondering if anyone would mind analysing my ezine articles? I want to see whether they are providing any substantial link juice to my web site.

I have linked to all of my ezine articles via multiple spun articles posted by unique article wizard, as was instructed by pat flynn's back linking strategy.

I noticed an improvement on my rankings initially, but recently my rankings seem to have stalled.

I'm open to any suggestions as to how I may improve the benefit of these articles... or whether I should create new tiered back link strategy?

The articles I posted on ezine direct too my main web site. The articles I posted using unique article wizard, are highly spun versions of the same articles posted on ezine. These articles link to the ezine articles, as to transfer link juice onto the ezine articles that link directly to my main web site.

I'm mainly trying to improve my google.co.uk ranking for computer clenaing, pc cleaning, it cleaning and data centre cleaning

I have tried dedicating a separate page for each of these keywords, as to distribute the link juice. It seems to be working somewhat, as I'm ranking on the 2nd and 3rd pages of google.co.uk for the keywords pc cleaning, it cleaning and data centre cleaning. I want to try and get these to 1st page rankings, If anyone has any suggestions I would appreciate it.

Thank you