Database error for wordpress mu

Hi,
I just installed the latest wordpress multiuser pack on my site.

Wen ever i add a blog through the site admin>Blog

an error occurs

WordPress database error: [Table 'sahil_3.wp_4_options' doesn't exist]
SELECT option_value FROM wp_4_options WHERE option_name = 'wp_4_user_roles' LIMIT 1

WordPress database error: [Table 'sahil_3.wp_4_options' doesn't exist]
SELECT option_value FROM wp_4_options WHERE option_name = 'blogname' LIMIT 1

WordPress database error: [Table 'sahil_3.wp_4_options' doesn't exist]
SELECT option_value FROM wp_4_options WHERE option_name = 'siteurl' LIMIT 1

WordPress database error: [Table 'sahil_3.wp_4_options' doesn't exist]
SELECT option_value FROM wp_4_options WHERE option_name = 'post_count' LIMIT 1

Warning: Cannot modify header information - headers already sent by (output started at /home/sahil/public_html/webunderground/makemeablog/wp-includes/wp-db.php:135) in /home/sahil/public_html/webunderground/makemeablog/wp-includes/pluggable.php on line 334

or wen i delete this comes

WordPress database error: [Table 'sahil_3.wp_3_options' doesn't exist]
SELECT option_value FROM wp_3_options WHERE option_name = 'wp_3_user_roles' LIMIT 1

Warning: Cannot modify header information - headers already sent by (output started at /home/sahil/public_html/webunderground/makemeablog/wp-includes/wp-db.php:135) in /home/sahil/public_html/webunderground/makemeablog/wp-includes/pluggable.php on line 334

wat to do now?

Plz help as i am new to these things(database)


Sry if this in wrong section