Hello AngelLaw,
You will want to contact your hosting company if you are on shared hosting. They will need to increase the memory.
If you are not using a shared hosting environment, these are the settings you will want to look into.
memory_limit
This sets the maximum amount of memory in bytes that a script is allowed to allocate.
Default size 5.3 in is “8M”
post_max_size (must be greater than upload_max_filesize)
Sets max size of post data allowed. This setting also affects file upload.
Default size in 5.3 is “128M”
upload_max_filesize
The maximum size of an uploaded file.
max_execution_time
This sets the maximum time in seconds a script is allowed to run before it is terminated by the parser.
Default setting in 5.3 is “30”
I believe you will want to increase memory_limit.
Cheers,