The reason why the texts are not shown is that there are too many events on the same day or on some day in the same week so there is no room for the text. You could try to increase the size of the month window so that the days are larger. Or change the skin to show less than 6 weeks so the remaining weeks can have more height. The "preshowcount" and "postshowcount" can be used to adjust how many weeks are shown (you need to edit the skin's xml file).
Hope you can help me, to illustrate my (desperate) need for (your) assistance, this is what my calender looks like: