If you're on the MLS the buyer's are seeing it. Agents will bring their clients if the buyers want to see it. Now some agents, whether they should or not, prefer not to deal directly with an owner. The potential liability and lack of current real market knowledge will reduce the pool of available buyers under circumstances like this.
Now the other reason you may see fewer buyers is if your photos, descriptions and general marketing material are not done well. The vast majority of buyers start on line and if your pictures are blurry or dark, filled with shadows and don't highlight what the buying public are looking for then your home will be overlooked.
Many seller's who choose this method of marketing assume they know better then the professional agents they've come across. Sometimes they do, but not because the seller is knowledgeable but because the agents they've met were not. Choosing an agent isn't about who's convenient or friendly or helping out someone who just got their license. It's about choosing someone to represent you in a major transaction. Like all professions, there are some great ones and a lot of mediocre and poor ones. If you continue to not get attention, reconsider your plan and consider hiring a top professional.
Finally, as others will surely say, you may be priced wrong. Agents, buyers and the public sees it, but they won't come because your competition looks like a better deal. If you do all the other steps in selling perfectly, but mis-price your home, it won't sell or sell for as much as it could.