Navigation between AUs

Ok, follow up on navigating the AUs in the LMS (LearnCenter). I have published the course (two AUs) in SCORM 2004 and have it uploaded into the LMS. When taking the course, the navigation screen appears & I am able to launch and take the first AU. After completing the AU & exiting, I am not able to move into or launch the second AU (exiting submits AICC_Lesson_Status, AICC_Score, & CMI_Completion_Status). The navigation screen in the LMS reappears, and I can see that I have competed the first AU, but the only options that I am given are: "Finished," "Return Later," or "Cancel." None of these will launch the next AU (even if I click out and return later.I have tried solving this problem every way that I can think of (which means every way except the right way ). Has anybody else experienced this or know of the solution. Is this an integration/setting issue in the LearnCenter?

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