Registration error

Hello,

when im trying to register using an existing email then instead of receiving the error message about "this email is in use... etc' '
im receiving the following error on the top of the screen:
Parse error: syntax error, unexpected T_STRING, expecting ',' or ';' in /home/bizid/domains/bizid.co.il/public_html/wp-content/plugins/buddypress/bp-core/bp-core-signup.php(92) : runtime-created function on line 1

and above the Email Field:

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, '' was given in /home/bizid/domains/bizid.co.il/public_html/wp-includes/plugin.php on line 339

it happens even when i use the default theme , or any other theme , when i use English or hebrew ,
nothings helps...

also i have another problem when trying to install a plugin i always get "connection timed out" any idea? im using wordpress and wordpress MU in many sites without ever receiving these errors before...

Thanks in advance for any assistance!