ART DIRECTION is what is needed here:
The cursive font just doesn't convey tech ( in general) . It's also so thin and hard to read that you are forced to use a larger font so that it begins to look like a large print book for senior citizens reading children stories. This may also be due to the background choice, but I will address that later.
Neither green is good NOR bad. But the combination conveys XMAS not TECH. :/ Either that or (with the lil stamp logo ) Tanqueray.
The back ground is the clever part, it still too pronounced and competes with what really vital in a business card: NAME , BUSINESS, AND CONTACT INFO!!! Get rid of the vigenette, this compounds the problem further. If you scaled down the image so that its just barely noticeable that its alpha numeric characters representing computer stuff. The background is an IMAGE, and the point of it is to give a FEEL not to allow anyone to read each line of code in the image you used.. the only thing they need to READ is your INFO.
After that chose a good, CLASSIC, BUSINESS-LIKE font. The BIGGEST type in the card should be your name OR (not AND) your SERVICE and that should NEVER be any bigger than 14-16pt bold. I would recommend your service. It's a blow to the ego but see it from the customers point of view. In their mind they are going to be looking for "computer services" not "That Tim Guy".
Your latest design is an improvement(especially on the font/readability dept department).. but think about what I said.
As far as addressing the color issue.
Consider a tone of green like this one: and/or
consider using muted tones of green and red... ( this can be done by reducing/increasing saturation/ brightness in a program such as Photoshop). As to the exact amount of toning.. well that you will have to do by eye.
I dislike picture cards and they do little to sell you (unless you are a model or a lawyer .. I dont even know why real estate agents and car shops insist on their mug shots...) But I know what you were feeling.. you wanted a central image to tie it all together. Consider a good shot of a COMMON computer part: a keyboard, a mouse a monitor.... crop it so that some of it is outside the frame for maximum effect.
I hope you are able to follow my tips. They should give you a marked improvement in the look and effectiveness of your business card.