php install problem when loading extensions

i need help in loading php extensions. first i install php with php triad in win XP. and then after some time i want to upgrade my php to 4.3.1 with self install .exe. after that i want to load the extensions in php.ini in c:apachephpextensions. then the errors come out when i want to load the extensions.
previously when i use php triad, also can;t load the extensions. the errors are same.

the errors are:

1. the procedure entry point php_sock_close could not be loaded in the dynamic link library php4ts.dll

2. unknown(): unable to load dynamic library ‘C:apachephpextensionsphp_hyperware.dll’ the specified action could not be found.

3. unknown(): iconv: unable to initialize module
Module compiled with module API:20010901, debug=0, thread-safety=1
PHP compiled with module API:20020429, debug=0, thread-safety=1
These options need to match


4. this application has failed to start because isqlt09a.dll was not found. Reinstalling the application may fix the problem



can you give the solutions?

thanks anyway