Beginner HTML, bug question

I'm creating my own webpage while working through the Front End Develop track to help the learning "stick" and have hit a snag I can't seem to figure out. I've created a page with my son's favorite sports teams in circle button png links across the nav bar. I got the first five in just fine, but the last two wouldn't display the picture in IE, I quadruple checked every character in the code and css and they are identical to the pics before them that display.

Weirdest thing is I changed default browser to Chrome and the pics/links display just fine. I switched back to IE and still the same problem. I'll gladly post the code, but since it works in Chrome but not IE I was thinking somebody with more experience may know what the issue is?

For info, the #dbacks button below is the last one to work in both IE and Chrome, the next two (#Martha and #logo_legends) only show in Chrome.

Any advice would be greatly appreciated.

#dbacks {

  float: left;
  margin: 0;
  padding: 0 35 0 35;
  width: 5em;

}

#martha {

  float: left;
  margin: 0;
  padding: 0 35 0 35;
  width: 5em;

}

#legends {

  float: left;
  margin: 0;
  padding: 0 35 0 35;
  width: 5em;  

}

<div id="dbacks">
      <a href="http://arizona.diamondbacks.mlb.com">
      <img src="pics/dbacks.png" alt="AZ Diamondbacks logo"></a>
  </div>
  <div id="martha">
    <a href="http://stmarthaschool.org">
    <img src="pics/stmarthaworking.png" alt="cloverleaf pic"></a>
  </div>     
  <div id="legends">
    <a href="http://legendssportsacademy502.com">
    <img src="pics/logo_legends.png" alt="LegendsSportsLouisvillelogo"></a>
  </div>