Slam Creepers were a rock band from Vansbro, Sweden formed by Bjorn Skifs in 1962 and broke up in 1969. Bjorn Skifs then went on a solo career. They had some moderate hits including a cover of a Foundations song "We Are Happy People". Skifs would later find success with a number 1 hit "Hooked on a Feeling as a member of Blue Swede.

Based on the paragraph above can we conclude that "The rock band Slam Creepers had some highly successful hits"?
No