Css problems

Hello and thank you for this great plugin! I am trying to make the letters inside the search box bigger and create a solid border as well.On one site i am using this plugin it wprks fine..but on another the css doesnt seem to work.What could be the issue? the code i am using is the following

#ajaxsearchlite1 .probox .proinput input, div[id*="ajaxsearchlite"] .probox .proinput input {
    font-weight: normal;
    font-family: Open Sans;
    color: #000 !important;
    font-size: 16px;
    line-height: normal !important;
    text-shadow: 0 0 0 rgba(255,255,255,0);
    border: 0;
    box-shadow: none;
    height: 29px;
}
#ajaxsearchlite1 .probox, div[id*="ajaxsearchlite"] .probox {
       border: solid #ccc;
    border-radius: 0;
   
  
}