Just to be clear... when you talk about a "lens", are you talking about a whole camera lens (like your 18-55) or an add-one filter (that is one piece of glass) that screws on to the front of your lens? I have managed to get to a computer and it looks like Commander make filters rather than lenses - the difference in terminology may appear subtle, but it is very significant.
If it is the latter, then you may be attaching a filter that is not the correct one for the kinds of photos you are trying to take. For example a close-up or 'macro' filter will only work if you are extremely close to your subject and the result will be that the camera cannot get focus and won't take a picture - which seems a bit like your situation.
To be honest, these filter bundles are usually made from cheap glass and will degrade the images you take compared to just using the lens. If you want to get a specific result, like taking close-up images of bugs for flowers, you can get pretty close with the 18-55, but if you want something a lot bigger, then you need a specific lens for that and not an add-on filter.
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
