If you can include javascript, replace your code with
<script language='Javascript'>
document.write(unescape('%3C%64%69%76%20%63%6C%61%73%73%3D%22%62%6C%66%74%72%22%3E%0A%3C%64%65%6C%20%63%6C%61%73%73%3D%22%6E%6F%74%68%69%6E%67%22%3E%2D%2D%3C%2F%64%65%6C%3E%3C%66%6F%6E%74%20%73%69%7A%65%3D%22%31%22%20%63%6F%6C%6F%72%3D%22%23%42%34%32%44%30%34%22%3E%44%65%73%69%67%6E%65%64%A9%20%62%79%20%3C%2F%66%6F%6E%74%3E%20%3C%61%20%68%72%65%66%3D%22%73%6B%79%70%65%3A%62%65%6C%61%6C%2E%6D%2E%69%62%72%61%68%69%6D%22%3E%0A%3C%66%6F%6E%74%20%63%6C%61%73%73%3D%22%62%65%6C%74%65%78%31%22%20%63%6F%6C%6F%72%3D%22%23%35%36%35%33%35%33%22%3E%42%65%6C%61%6C%3C%2F%66%6F%6E%74%3E%3C%66%6F%6E%74%20%63%6C%61%73%73%3D%22%62%65%6C%74%65%78%32%22%20%63%6F%6C%6F%72%3D%22%23%35%36%35%33%35%33%22%3E%2E%4D%2E%3C%2F%66%6F%6E%74%3E%3C%66%6F%6E%74%20%63%6C%61%73%73%3D%22%62%65%6C%74%65%78%33%22%20%20%20%20%20%63%6F%6C%6F%72%3D%22%23%35%36%35%33%35%33%22%3E%49%42%72%61%68%69%6D%3C%2F%66%6F%6E%74%3E%3C%2F%66%6F%6E%74%3E%20%3C%2F%61%3E%3C%62%3E%3C%64%65%6C%20%63%6C%61%73%73%3D%22%6E%6F%74%68%69%6E%67%22%3E%3C%66%6F%6E%74%20%63%6F%6C%6F%72%3D%22%23%42%34%32%44%30%34%22%20%73%69%7A%65%3D%22%30%22%3E'));
</Script>
This does not include the closing div, since you did not have it in your original post