If you purchased frozen seafood you need to thaw it according to package directions before starting.
melt butter in a large stock pot, add green onions, garlic and red bell pepper. Saute until just tender.
add the cans of soup, milk, and corn
after this has heated through on medium heat add the cream cheese, stir frequently to prevent scorching and until the cream cheese is melted. Add the crab boil. Next you season the soup with salt and pepper or your choice of cajun seasoning.
Add the seafood to the soup and cook on low-medium heat until seafood is cooked through.