Translation of Metzgerei

I need to write you one more sentence. This is what my teacher told me and the German language is so difficult. So please, as a last favor, would you please write the sentence for me in German?
As promised, I am sending you in the attachment a (very) little overview of some applications we created on Vocabulix. Please send me also some infos about your activities. When would be the best time to talk?
If the issue reoccurs let me know immediately, as it is not acceptable for us! I will look into the network files. Dan, it is great that you put so much effort in helping us. It keeps us going.