Declaring LD_PRELOAD system wide for dynamic loading

Dear Fellows;

As being new to linux, i have tried to synamically load a custom library which overrides some system calls like conncet(), socket() etc.... for custom purposes.

It works well, if declaring the environment path LD_PRELOAD and execution of the application to be override are in the same script of perhaps same path as well.

Inshort i am un able to declare the path for dynamic library through LD_PRELOAD system wide, i have tried different ways like saving the LD_PRELOAD path in profile of linux core 9 but it gives error like ..

Unable to load the LD_PRELOAD=./path ...... etc

I would appreciate a concise and swift help, thanking in anticipation.

Regards,

-zeeshan