Problem error 500 after update

[Joaquin Mares]

Hi, we program our site in early 2012 with SLIR script. Now it doesn't function. It serves an error 500.

I think last week the server updates php version to 5.3 from 5.2

any idea?

This is an example:  http://www.reformas-y-rehabilitaciones.es/resize/w63-h63-c1x1/uploads/galerias/cartografia_1313691027.jpg

Many thanks